Paper-perforating device.



B. F. BERRY. PAPER PERFORATING DHVIGE.

v ATPLIGATION FILED mum. 1911.

Patented Jan. 9, 1912.

lnvenbor:

BENJAMIN F. BERRY, OF ST. LOUIS, MISSOURI.

PAPER-PERFORATING DEVICE.

Specification of Letters Patent,

Application filed January 9, 1911.

Patented Jan. 9,, Serial No. 601,536.

To all whom it may concern:

Be it known that I, BENJAMIN F. BERRY, a citizen of the United States ofAmerica, residing in the city of St. Louis and State of Missouri, haveinvented certain new and useful Improvements in Paper-PerforatingDevices, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to a device for perforating sheets of paper,comprising a hollow cutter by which the paper is perforated and a spiralconveyer for conducting the disks of paper out out through the hollowcutter as rapidly as they enter into the cutter and without anypossibility of their becoming clogged in said cutter.

Figure I is in part a longitudinal section of my hollow cutter and inpart an elevation of the spiral conveyer therein. Fig. II is a crosssection through the hollow cutter and spiral conveyer. In theaccompanying drawings: 1 designates the hollow cutter of my perforatorwhich is provided at its working end with a cutting edge 2 andintermediate of its ends with an escape opening 3 through which the cutout pieces of paper produced in the operation of the perforating devicemay be discharged after they have traversed the working portion of thecutter. The cutter is provided with a shank 4 to which any suitablemeans may be applied for the purpose of causing endwise movement of thecutter and also rotating it while it is performing the duty of making aperforation through a mass of sheets of paper such as those indicated atA, Fig. I. No invention per se is herein claimed for the hollow cutterof my perforating device.

5 designates a spiral conveyer operable in the hollow cutter 1 andadapted to be rotated by any suitable means. This spiral conveyer hasits working end located above the cutting edge of the hollow cutter andis not intended to cut into the sheets of paper operated upon by thecutter, but only to pick up the pieces of paper out out by the cutterand convey them through the hollow cutter to the discharge opening 3.The conveyer has a spiral 6 that is of corkscrew shape and terminates atits extremity in a single beveled lip 7 offset from the axial linethrough the spiral conveyer so that it is located entirely away from thetransverse center of the spiral in a manner to permit of the passage ofthe beveled lip beneath the cut out pieces of paper and the ascent ofsuch pieces into the spiral of the conveyer.

With the object in view of facilitating the conveyance of the cut outpieces of paper through the hollow cutter of my perforating device bythe spiral of my conveyer without liability of the pieces of paperbecoming wedged in the spires of the conveyer, I make,

the spiral of my conveyer of peculiar form.

If the pitch of the spires, 2'. 6., the space within the spires, wereuniform throughout the length of the spiral, one of two disadvantageswould be present. A spiral having its spires near each other has greatervalue as a lifting device than one wherein the spires are more widelyseparated, but a spiral of the first mentioned type moves the materialslowly and is liable to wedge or clog the material between the closelyarranged spires. spires were of uniform length and widely separated fromeach other, the value of the spiral as a lifting device would bediminished or destroyed. To overcome these disadvantages, the spaceswithin the spires of the upper portion of the spiral 6 are of greaterlength than the space within the terminal spire. The lower portion ofthe spiral, which lies near the cutting edge 2 of the hollow cutter istherefore shaped to provide the required amount of power to positivelyelevate the disks of paper punched out by the hollow cutter l, and asthese disks move upwardly they pass freely through the spaces within theupper spires and are finally discharged through the opening 3. Thespires having the spaces of greater If the spaces within the.

length also serve as a lifting medium, but,

and it is so formed as to practically elimigaging the cut out piecesandan enlarged nate all liability of the paper being wedged recesscorresponding with the discharge 10 or clogged in the hollow cutter.opening of the hollow cutter.

I claim: A perforating device comprising a hollow BENJAMIN BERRY cutterhaving a cutting edge and a discharge In the presence of opening and aspiral conveyer within the H. G. CooK, hollow cutter having a beveledlip for en- E, B. LINN.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, I). G.

